Thanks Pizza Guy,
I am an engineer but not an EE controls cat. After looking at your attached wiring diagram my thought is maybe one of our expert xfire EE's should be to able to find a way of integrating a standard auto relay within the BCM. A relay with a broad power range (.1 - 150w) would allow LED's and combinations of incandescent and LED's to be used. Has anyone cross referenced the SLK320 turn signal BCM design or is it the same as the xfire?
Thanks